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How to use Regular Expressions (Regex) in Microsoft Excel both in-cell and loops
How can I use regular expressions in Excel and take advantage of Excel's powerful grid-like setup for data manipulation?
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Is “argv[0] = name-of-executable” an accepted standard or just a common convention?
When passing argument to main() in a C or C++ application, will argv[0] always be the name of the executable? Or is this just a common convention and not guaranteed to be true 100% of the time?
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What's the simplest way to test whether a number is a power of 2 in C++?
I need a function like this:
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Are members of a C++ struct initialized to 0 by default?
I have this struct :
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How to remove leading zeros from alphanumeric text?
I've seen questions on how to prefix zeros here in SO. But not the other way!
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How to split a string and assign it to variables
In Python it is possible to split a string and assign it to variables:
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Removing leading zeroes from a field in a SQL statement
I am working on a SQL query that reads from a SQLServer database to produce an extract file. One of the requirements to remove the leading zeroes from a particular field, which is a simple VARCHAR(10) field. So, for example, if the field contains '00001A', the SELECT statement needs to return the...
Dynamically select data frame columns using $ and a character value
I have a vector of different column names and I want to be able to loop over each of them to extract that column from a data.frame. For example, consider the data set mtcars and some variable names stored in a character vector cols . When I try to select a variable from mtcars using a dynamic s...
Finding sum of elements in Swift array
What is the easiest (best) way to find the sum of an array of integers in swift?
I have an array called multiples and I would like to know the sum of the multiples.
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How do I convert a numpy array to (and display) an image?
I have created an array thusly:
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